Not quite as hard to find as the Golden Peach, the Silver variety is a human-created hybrid that has some of the same Lifespan-altering properties.
Monster Rancher 2[]
Extends your monsters Lifespan by 25 weeks, and must be won in the Elder's Cup that becomes available on the 2nd week of June after your monster reaches 6 years, 3 months old. No monster can consume more than one Silver Peach in its lifetime.
Monster Rancher DS[]
Can be found on errantries at random if your Loyalty is very high. You can also obtain a Silver Peach by purchasing one from Torr.
Monster Rancher Explorer[]
Gives you 50,000 game points.
Gallery[]
Silver Peach from MR2